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- W2084810814 abstract "We use hourly sea level records from southern California to the Aleutian Islands to examine low-frequency variability in the northeast Pacific during the 1982–83 and 1997–98 El Niño events. Comparison between events is facilitated by long-term records for Yakutat, Tofino, Neah Bay, and San Francisco which appear to be representative of distinct coastal oceanic regimes. Residual (tide-removed) time series reveal that the anomalously high sea levels of the 1997–98 El Niño persisted from the spring of 1997 to the spring of 1998, and this event was more protracted than the 1982–83 El Niño. During both major events, the annual (Sa), semiannual (Ssa), and synoptic-scale sea level constituents were amplified relative to non-El Niño years, with synoptic fluctuations in sea level height and sea level pressure for mid-latitude sites Tofino and Neah Bay strongly correlated through the inverted barometer response. The spectral anomaly coefficient, SjR(ω)=[Rj(ω)−1]/[Rj(ω)+1] (where Rj(ω)=Sj/S̄j is the spectral ratio between the El Niño spectrum, Sj(ω), and the time-averaged non-El Niño spectrum, S(ω)j, for tide gauge site “j”) indicates that both events gave rise to enhanced sea level variability at periods of days to weeks because of passing atmospheric systems. However, the 1982–83 El Niño generated greater signal variance at seasonal-scales (periods of months) while the 1997–98 El Niño generated greater variance at synoptic scales (periods of days). Findings further indicate that poleward oceanic propagation of the 1982–83 and 1997–98 events terminated near central California, and that much of the enhanced sea level variability observed at mid to high latitudes was associated with atmospheric teleconnection responses that gave rise to amplified variations in coastal sea level pressure and/or surface wind stress." @default.
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- W2084810814 date "2001-01-01" @default.
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- W2084810814 title "Spectral characteristics of sea level variability along the west coast of North America during the 1982–83 and 1997–98 El Niño events" @default.
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- W2084810814 doi "https://doi.org/10.1016/s0079-6611(01)00030-1" @default.
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